A) four times that of a hydrogen molecule
B) half that of a hydrogen molecule
C) two times that of a hydrogen molecule
D) same as that of a hydrogen molecule
Correct Answer: D
Solution :
\[\text{He}\,\text{=}\,\text{2H}\]\[\text{K}\text{.E}\text{.}\]of \[\text{He}\,\text{=}\,\text{?}\] Kinetic energy of helium must be same as that of hydrogen molecule.
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